Improvement in



UNTED STATES PATENT' OFFICE.

J AMES J. BURNET AND VILLIAM BEL'LAMY, `OF NEW YORK, N. Y., ASSIGNORS /TO GEO. R. JACKSON, OF SAME PLACE.

IMPROVEMENT IN APPLYING LOCKS TO SAFE-DOORS.

Specification forming part of Letters Patent No. 39,001, dated June 23, 18C3.

To all whom, it may concern:

Be it known that we, JAMES J. BURNET and WILLIAM: BELLAMY, of the city, county, and State of New York, have invented a new and Improved Mode ot' Applying Locks to Sat'e, Bank-Vault,and other Doors; and we do hereby declare that the following is a full, clear, and exact description of the same, ret'erence being had to the accompanying drawings,mak ing a part of this specification, in which- Figure 1 is a view of the inner side of a safedoor with ourimprovementapplied to it; Fig. 2, an outer side view of the saine; Fig. 3, avertical section of the same taken in the line x x, Fig. l.

Similar letters ot' reference indicate corresponding parts in the several figures.

Safe-locks of the expensive burglar-proof kind are, as is well known, quite complicated and liable to get out of repair, so as not to be capable of being opened in a legitimate manner by the proper key, and this contingency almost invariably happens ifv the lock has been tampered with by a burglar. When this occurs, the door has to be out open, at considerable expense and trouble, in order to reach the lock, so that it may be detached for repairs.

, The object of our invention is to obviate this ditliculty; and to this end we apply two locks to the door, arranged or connected in such a manner with the bolt-frame thatin case of one lock get-ting out of repair, so that it cannot be opened by its key, the door may bevunlocked by the other lock, as hereinafter fully shown and described.

To enable those skilled in the art to fully understand and construct our invention, we will proceed to describe it.

A represents the door of a safe, which may be constructed and applied to the safe in the usual or in any proper way, and B represents the bolt-frame, which is fitted at the inner side of the door, and provided with a series of hori- A A zontal bolts, a, the frame B being allowed to slide horizontally, so that the ends of the bolts a may be thrown into and withdrawn from the nosing or recess b in the side of the safe. This bolt-frame may be constructed in the usual manner, and therefore does not require a more minute description.

To about the center of the front stile, c, of the bolt-frame there is attached by a pivot, d, an

arm, C, which projects inward, or toward the hinged side of the door A, and has its outer or disengaged end of pointed or square form, as shown in Fig. l at ax. rIhe bolt-frame is moved, when it is allowed to move, by means ot'a bit, D, which is on the inner endof an arbor, c', the latter passing through the door` and having a knob, E, on its outer end, the bit D working in a notch, d', in a bar, F, attached to the stilec, as shown clearlyin Fig. l.

G G represent two locks, which are applied to the door A, one over the other, as shown clearly in Fig. l. These locks may be of any desired construction, and they may be of the same or different kinds, so as to be opened with one and the same key, or with different keys, as may be desired.

H H represent two clamps, which are secured by pivots d d to the inner side of the door A,near the ends of thelocks, out of which the lockbolts e e project when shoved outward. The t'orm ot' these clamps is shown clearly in Fig. l. rlhe outer ends of these clamps are curved, so as to'lform hooks ff, which, when the bolts e e of the locks are shoved outward, catch respectively over the upper edge of the bolt e of the upper lock, G, and under the bolt e of the lower lock, G. The inner ends ofthe clamps H H have beveled or oblique projections g g', as shown clearly in Fig. l, the space between which is in line with the arin O. The lower clamp, H', has aspring, h, bearing againstit,which spring has a tendency to keep said clamp in an upright position and against a pin or stop, 1J. The upper clamp. H, has a tendency to remain in a corresponding position by its own gravity, as the center of gravity of said clamp is below its pivot d. When the bolt-frame B is operated by turning the bit D so as to throw the .bolts a in their nosing or recess b, and both bolts e c of the locksGG are thrown outward, so as to be in contact with the clamps H H', the door A is in aloeked state, for the oblique projections g gof the clamps prevent the boltframe from being shoved back; and in case it is subjected to a pressure,with aview of forcing it back, the free pointed end a of the arm C will cause the hooked ends f f of the clamps to bear against the bolts e c', and thereby effectually preclude said bolts e e being forced back.

To unlock the door all that is necessary is to unlock one of the locks only, to admitdof the clamp H or H yielding or giving under the movement or action of the arm G of thenboltframe, and said arm is allowed to move a little on its pivot, in order to admit of the boltfraine being shoved back. derstood by referring to Fig. l, in which the lower bolt, c', is represented as being thrown back, in red, and the lower clamp, H, moved or pressed down under the action of the arm C, the latter being deflected a little downward by the fixed clamp H. W'hen the bolt-frame B is shoved forward to its original position, in orderto lock the door A, the spring IL throws up the clamp H to its formerposition and the bolt e thrown outward against said clamp. 'By this arrangement, therefore, it will be seen that the door may be unlocked by unlocking either of the locks G G', one remaining in a locked state, and consequentlyif one lock should get out of repair the door may be unlocked by means of the other.

This will be un-' Itis designed in practice to use one lock only in unlocking the safe, one remaining always in a locked state and not used except the other should get out of repair.

We would remark that the bit D may be applied to the bolt-frame B at any point between the upper and lower end of the latter.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is- The employment or use on a vsafe or other door, of two or more locks, G G', in connection with clamps H H', and an arm, C, or an equivalent device, so arranged that the boltframe B may be actuated or shoved back, in order to unlock the door, by unlocking one lock only, as set forth.

JAMES J. BURNET. WVM BELLAMY.

Witnesses:

ROB. H. LAUDER, GEO. aV. REED. 

